Improved doweling-machine for the use of coopers



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UNITED ASrATEs TENT EricE.

JOHN GERMAN, OF ORISKANY FALLS, NEWT YORK.

Specification forming part of Letters Patent No. 37,619, dated Februaryl0, 1863.

cation, in which- Figure l is a back view of my inventh n 1u elevation;Fig. 2, a plan or top view of the same 5 Fig. 3, a side elevation of thesame; Fig. 4, a detached front view ofthe feed-table.

Similar letters of reference indica-te corresponding parts in theseveral figures.

This invention relates to a new and im- `proved machine for boring holesin barrelheading to receive the dowel-pins, which conneet the severalparts or pieces of the heads together.

The invention consists in a novel manner Of arranging the drivingmechanism which rotates the bits, and also in a novel construction ofthe feed-table, as herein shown and described, whereby the bits may beadjusted with the greatest facility so as to bore the holes into thepieces of heading at the proper points, the machine being at the sametime adapted for boring heading of different thicknesses without anyspecial adjustment of the working parts of the former.

To enable those skilled in the art to fully understand and constructmyinvention, I will proceed to describe it.

A represents a bed-piece on which a frame, B, is secured. This frame Bis composed of two parts, a b, the part a being formed of two horizontalparallel bars, c c, placed one above the other, and connected at theirends and at their center by uprights d d. The part b of the frame Bconsists of an upright bar, e, the lower end of which is securedcentrally to the part a by a screw-bolt, f. The bar e has a slot, g,made in it, which extends from a point near its upper end nearly down tothe upper bar, c, of the part a of the frame B, and in this slot g; theaxis h of a pulley, C, is fitted and secured at any desired point by anut, z', which is fitted on a screw cut on the part of the arbor whichpasses through the slot g, the axis h having a collar, i', upon it,which bears against the outer side of the bar e. The pulley O has agrooved periphery and is provided with a handle, j.

D D are two slides, which are fitted to the part a of the frame B. Theseslides are formed of upright plates, which extend above the part a ofthe frame B, and have projecting surfaces k at their lower parts, whichfit between the bars c c. (See Fig. 3.) The slides are secured to va bymeans of screw-bolts l, provided with thumb-nuts m, the bolts Z passingthrough the lower parts of the slides D and between t-he bars c c. Tothe upper part ot' each slide D there is attached a horizontal tube, u,in each of which an arbor, E, is fitted and allowed to rotate freely. Onthe backend of each of these arbors E there is placed a pulley, F. Theperipheries of these pulleys F are grooved, and a belt, G, passes aroundthem and the pulley C, as shown clearly in Fig. 1. The front ends of thearbors E are provided with conical screws o, which are slottedlongitudinally, and are tubrlar, in order to receive the shanks of thebits, the lat ter being firmly secured in the screws o by screwing upnuts p, which are placed on the latter.

From the above description it will be seen that the slides D D, andconsequently the bits, may be adjusted nearer together or farther apart,as desired, and the belt G alwaysv kept 'at a proper degree of tensionby raising or lowering the pulleys C.

On the bed-piece A there are placed and permanently secured two.parallel ways or guides, q g, which are at right angles with the part aof the'frame B. On these ways or guides q q a feed-table, H, is placed,and allowed to slide freely, the ways or guides q fitting in grooves r1' in the under side of the feed-table. This feed-table is composed of aboard, s, having four cleats, tt t t', attached longitudinally to itsupper surface, as shown in Fig. 2. These cleats have their Lippersurfaces inclined, their inner ends being rather higher than their outerends, as shown clearly in Fig. 4. On each pair of cleats t t t t thereis secured at right angles a bar, u, the upper surfaces of which areparallel with the upper surfaces of the cleats t tt t. 0u these bars uthe pieces ofthe head to be bored rest, the pieces bearing against pinse in the outer ends of the bars a. The pieces are fed to the bits byshoving forward the feed-table H'by hand, the bits boring` edgewise intothe pieces of the head. rlhe pieces of thehead may always be adjusted,however much they may vary in thickness, so that the bits will borecentrally into them by sliding them a trie either to the right or lefton the bars u, the inclination of the latter and the cleats t t t teffecting this result. This will bc understood by referring to Fig. 4,in which a piece of a head, ax, is shown in outline on one of the barsu, the dotted lines showing the adjustment of the piece.

Having thus described my invention, what combination with the pulleysGFF, belt Gr,

slides D D, and bitarbors E, as and for the purpose specified.

JOHN GERMAN. Witnesses:

LEONARD HoLMEs, WILLIAM MAYON.

